The drug cocaine exerts its stimulatory effect by
a. inhibiting phosphodiesterase activity, allowing an accumulation of cAMP and stimulation of PKA.
b. activating purinergic receptors.
c. inhibiting dopamine reuptake, resulting in prolonged activation of dopamine receptors by endogenous dopamine.
d. none of these.
C
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The sequence of symptoms of heatstroke is
A. intense itching, profuse sweating, kidney failure, racing pulse, headache. B. neurological symptoms, dizziness, skin reddening, and then headache and racing heart. C. headache, dizziness, exhaustion, then sweating, which stops as the skin becomes red, hot, and dry. D. fever, itching, redness, headache, numb extremities, vomiting.
A dog with cataracts may undergo a/an ________________ to remove the cloudy lens
Fill in the blank(s) with correct word
The maximum amount of air that can be exhaled from the lungs after a maximum inhalation is the ________
A) expiratory reserve volume B) tidal volume C) inspiratory capacity D) vital capacity
Because of their short lifespan, a huge number of erythrocytes are recycled by macrophages. Which of the following is NOT a function of the macrophage?
A.) The macrophage phagocytizes hemoglobin from the bloodstream. B.) The macrophage synthesizes a small amount of hemoglobin and transports it to the bone marrow. C.) The macrophage phagocytizes deteriorating and fragmented erythrocytes. D.) The macrophage extracts iron from the heme portion of hemoglobin. E.) The macrophage dismantles the globin portion of hemoglobin into individual amino acids.